尝试创建循环或使用lapply从一个数据帧生成多个图时,我遇到各种麻烦。
df
target A.O2 A.H2O A.conc A.bias B.O2 B.H2O B.conc B.bias C.O2 C.H2O C.conc C.bias
1 85 20.90 0.06 254.96 0.01 20.90 0.06 255.02 0.03 20.90 0.06 254.98 0.01
2 50 20.90 0.09 150.09 0.09 20.90 0.09 150.06 0.08 20.90 0.09 150.00 0.03
3 25 20.94 0.09 75.24 0.31 20.94 0.09 75.47 0.62 20.94 0.09 74.98 -0.04
4 85 10.00 0.08 251.99 -1.22 10.00 0.08 252.02 -1.21 10.00 0.08 252.01 -1.21
5 50 10.00 0.09 148.51 -1.06 10.00 0.09 148.52 -1.05 10.00 0.09 148.50 -1.06
6 25 10.00 0.07 74.00 -1.27 10.00 0.07 74.03 -1.24 10.00 0.07 74.03 -1.24
7 85 0.10 0.06 246.99 -3.13 0.10 0.06 247.01 -3.13 0.10 0.06 247.00 -3.13
8 50 0.10 0.14 146.50 -2.39 0.10 0.14 146.50 -2.39 0.10 0.14 146.45 -2.42
9 25 0.10 0.10 72.97 -2.55 0.10 0.10 73.04 -2.45 0.10 0.10 73.04 -2.44
我想创建其中X = O2(A.O2,B.O2,C.O2)和Y =偏差(A.bias,B.bias,C.bias)的图,并根据目标列中的值。
library(ggrepel)
ggplot(df, aes(A.O2, A.bias)) +
theme_bw() +
theme(legend.position = 'bottom', plot.title = element_text(hjust=0.5)) +
geom_point(aes(colour = factor(target))) +
geom_line(aes(colour = factor(target))) +
geom_text_repel(aes(label=paste(A.bias),
hjust= 0.4,
vjust=-.8, colour = factor(target)),
size = 3) +
ggtitle('A') +
labs(
x = expression('O'[2]),
y = "bias",
colour = 'conc'
)
我想重复相同的代码,唯一的变化是 aes()
和 ggtitle()
中的X和Y值。我尝试查找类似的帖子以使用for循环或lapply来执行此操作,但似乎没有任何效果。
答案 0 :(得分:1)
可能将数据重塑为长格式并使用facet_grid
。当我们切换列名的后缀和前缀时,使用reshape
很容易。
names(df) <- sapply(lapply(strsplit(names(df), "\\."), rev), paste, collapse=".")
dfl <- reshape(df, varying=2:13, direction="long")
library(ggplot2)
library(ggrepel)
ggplot(dfl, aes(O2, bias)) +
theme_bw() +
theme(legend.position = 'bottom', plot.title = element_text(hjust=0.5)) +
geom_point(aes(colour = factor(target))) +
geom_line(aes(colour = factor(target)))+
geom_text_repel(aes(label=paste(bias),
hjust= 0.4,
vjust=-.8, colour = factor(target)),
size = 3) +
facet_grid("time") +
# ggtitle(z) + ## not needed
labs(
x = expression('O'[2]),
y = "bias",
colour = 'conc'
)
或者,如果您希望三个单图,可以将代码与ggsave
一起放入一个函数中,以在lapply
循环中使用。
FUN <- function(x) {
ggplot(dfl[dfl$time == x, ], aes(O2, bias)) +
theme_bw() +
theme(legend.position = 'bottom', plot.title = element_text(hjust=0.5)) +
geom_point(aes(colour = factor(target))) +
geom_line(aes(colour = factor(target)))+
geom_text_repel(aes(label=paste(bias),
hjust= 0.4,
vjust=-.8, colour = factor(target)),
size = 3) +
# facet_grid("time") + ## not needed
ggtitle(x) +
labs(
x = expression('O'[2]),
y = "bias",
colour = 'conc'
)
ggsave(paste0("plot", x, ".png"))
}
times <- c("A", "B", "C")
lapply(times, FUN)
这会将三个图保存在您的工作目录中:
dir()
# [1] plotA.png
# [2] plotB.png
# [3] plotC.png
示例图:
数据:
df <- structure(list(target = c(85L, 50L, 25L, 85L, 50L, 25L, 85L,
50L, 25L), A.O2 = c(20.9, 20.9, 20.94, 10, 10, 10, 0.1, 0.1,
0.1), A.H2O = c(0.06, 0.09, 0.09, 0.08, 0.09, 0.07, 0.06, 0.14,
0.1), A.conc = c(254.96, 150.09, 75.24, 251.99, 148.51, 74, 246.99,
146.5, 72.97), A.bias = c(0.01, 0.09, 0.31, -1.22, -1.06, -1.27,
-3.13, -2.39, -2.55), B.O2 = c(20.9, 20.9, 20.94, 10, 10, 10,
0.1, 0.1, 0.1), B.H2O = c(0.06, 0.09, 0.09, 0.08, 0.09, 0.07,
0.06, 0.14, 0.1), B.conc = c(255.02, 150.06, 75.47, 252.02, 148.52,
74.03, 247.01, 146.5, 73.04), B.bias = c(0.03, 0.08, 0.62, -1.21,
-1.05, -1.24, -3.13, -2.39, -2.45), C.O2 = c(20.9, 20.9, 20.94,
10, 10, 10, 0.1, 0.1, 0.1), C.H2O = c(0.06, 0.09, 0.09, 0.08,
0.09, 0.07, 0.06, 0.14, 0.1), C.conc = c(254.98, 150, 74.98,
252.01, 148.5, 74.03, 247, 146.45, 73.04), C.bias = c(0.01, 0.03,
-0.04, -1.21, -1.06, -1.24, -3.13, -2.42, -2.44)), class = "data.frame", row.names = c("1",
"2", "3", "4", "5", "6", "7", "8", "9"))